A regular expression is a pattern describing a certain amount of text and is a type of shorthand to describe a search pattern. It is used to find text which matches a pattern within a larger text, to replace the matching text or to split the matching text into groups. Regular expressions power of extracting specific text from documents resides in their ability to replace many lines of code with as little as one line. Some terms used in regular expressions: Literal - A literal is a character we use in a search or matching expression. For example, to find

In our current app we are using kalendae datepicker plugin. Lately, we wanted to add a 'today' button that is visible to the user in all the datepicker popovers(used for numerous date fields throughout the app). As the name suggests on clicking this button, the current date gets selected and is displayed in the corresponding field. Github link of kalendae - https://github.com/ChiperSoft/Kalendae We can do this by writing function to add button in popup and then we can use it wherever we need. function setTodaysDate(kalendae_popup){ var inputToAdd = $("", { type : "button", id : "set_today_date"